
  .base-header {
    box-sizing: border-box;
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    padding: 0 10px;
    height: var(--headerHeight);
    background-color: #fff;
  }

  .base-main {
    box-sizing: border-box;
    padding-left: var(--sidebarLeft);
    padding-top: var(--headerHeight);
  }

  .base-sidebar {
    position: fixed;
    top: var(--headerHeight);
    left: 0;
    bottom: 0;
    width: 200px;
    background-color: #304156;
  }